~~- Surface routes inside 500 nmi (926 km), about 1 day of cloud travel. A display of all known transient shipping was presented in conjunction with both the Surface radex area and the long-range fallout plot. ~~ CINCPAC advisories (72-hour trajectory, native population outlook, air and surface routes). The general features of the proposed advisories to CINCPAC were presented for coordination and concurrence of CUTF 7. -- Position of task force ships. Recommended positioning of the task force ships was based on the Surface radex area. (Operational problems relative to the surface radex area and fleet positioning were resolved by the commander and staff based on the radsafe briefing information.) ~- Cloud-tracking plan. The plan was reviewed as necessary to adjust to changes in forecast wind patterns. A general overall statement of favorability or unfavorability of se radsafe shot conditions was given as summary and conclusion to the radsa le briefing. Radiation Protection Modifications ' Special radiation protection measures were available to TG 7.4 cloudtracking and -sampling aircrew members. In Operation IVY, pilots of the F-84G sampling aircraft wore a lead-cloth suit and a lead-covered helmet for radiation protection. Because the lead-cloth suits were bulky and restricted movement, protective clothing for pilots was redesigned for Operation CASTLE. The 4926th Test Squadron at Kirtland AFB, New Mexico, developed a nylon sleeveless vest with a chest-size section of fiberglass Later, the vest was modified by adding more lead material to the sides for torso protection. (2.72 kg). The final vest weight was about 6 pounds The vest proved satisfactory for escape in water when tested in the Kirtland AFB swimming pool. pounds Also, a lead vest weighing about 14 (6.35 kg) was developed for WB~29 crewmembers. In addition to the lead vests for pilots, the seat backs and bottoms of F-84G sampler aircraft were sheathed with lead. ne a ie and lead. (The thickness is not 120 ph